TM 5-6675-270-15
MAINTENANCE ALLOCATION CHART
INTRODUCTION
Section 1.
electrical or mechanical failure by use of test
B-1. General
equipment.
a. This section provides a general explanation
C-Service. To clean, to preserve, to charge,
of all maintenance and repair functions authorized
and to add fuel, lubricants, cooling agents, and
at various maintenance levels.
air. If it is desired that elements, such as painting
b. Section II designates overall responsibility
and lubricating, be defined separately, they may
for the performance of maintenance functions on
be so listed.
the identified end item or component. The imple-
D-Adjust. To rectify to the extent necessary
mentation of the maintenance functions upon the
to bring into proper operating range.
end item or component will be consistent with the
E-Aline. To adjust specified variable elements
assigned maintenance functions.
of an item to bring to optimum performance.
c. Section III lists the special tools and test
F-Calibrate. To determine the corrections to
equipment required for each maintenance function
be made in the readings of instruments or test
as referenced from Section II.
equipment used in precise measurement. Consists
d. Section IV contains supplemental instruc-
of the comparison of two instruments, one of
tions, explanatory notes and/or illustrations re-
which is a certified standard of known accuracy,
quired for a particular maintenance function.
to detect and adjust any discrepancy in the ac-
curacy of the instrument being compared with
B-2. Explanation of Columns in Section II
the certified standard.
a. Group number, Column (1). The assembly
G-Install. To set up for use in an operational
group is a numerical group assigned to each as-
environment such as an emplacement, site, or
sembly in a top down breakdown sequence. The
vehicle.
applicable assembly groups are listed on the MAC
H-Replace. To replace unserviceable items
in disassembly sequence beginning with the first
with serviceable like items.
assembly removed in a top down disassembly
sequence.
I-Repair. Those maintenance operations neces-
sary to restore an item to serviceable condition
b. Assembly Group, Column (2). This column
through correction of material damage or a
contains a brief description of the components of
specific failure. Repair may be accomplished at
each assembly group,
each category of maintenance.
c. Maintenance Functions, Column (3). This
column lists the various maintenance functions
J-Overhaul. Normally, the highest degree of
maintenance performed by the Army in order to
(A through K) and indicates the lowest mainte-
minimize time work in process is consistent with
nance category authorized to perform these func-
quality and economy of operation. It consists of
tions. The symbol designations for the various
that maintenance necessary to restore an item
maintenance categories are as follows:
to completely serviceable condition as prescribed
C-Operator or crew
by maintenance standards in technical publica-
O-Organizational maintenance
F-Direct support maintenance
tions for each item of equipment. Overhaul nor-
H-GeneraI support maintenance
mally does not return an item to like new, zero
D - D e p o t maintenance
mileage, or zero hour condition.
The maintenance functions are defined as follows:
K-Rebuild. The highest degree of materiel
A-Inspect. To determine serviceability of an
maintenance. It consists of restoring equipment
item by comparing its physical, mechanical, and
electrical characteristics with established stand-
as nearly as possible to new condition in accord-
ance with original manufacturing standards.
ards.
Rebuild is performed only when required by oper-
B-Test. To verify serviceability and to detect
B-1
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